gnokii is a multisystem tool suite for mobile
phones. It provides a library to communicate with
a phone hiding the communication protocol. The
library handles SMS, phonebook, calendar, phone
calls, and other mobile phone capabilities. It
supports Nokia-FBUS mobiles, AT-capable phones
(most of the mobiles), as well as Symbian-based
phones.

phlyMail is a groupware, webmailer, and PIM. It offers unlimited nested groups, unlimited POP3/IMAP profiles, quotas, an integrated address book, a calendar with multiple reminders and event repetitions, a file manager with an integrated WebDAV server, the ability to send faxes, SMS support (which lets you send SMS, get reminded of events via SMS, and get email notification via SMS), a bookmark manager, themes, and multilingual support. It uses either sendmail or SMTP to send email, and can handle MIME and SSL connections. Support for IDN (Internationalized Domain Names) is included. Through its modular design, it's easy to add completely new features as modules, which can be plugged into the system.

Calcurse is a text-based calendar and scheduling application. It helps keep track of events, appointments, and everyday tasks. A configurable notification system reminds the user of upcoming deadlines, and the curses based interface can be customized to suit user needs. All of the commands are documented within an online help system.

Moyobase is a Web application designed to manage all your data and
information in one place. Its powerful customizable features allow you
to structure data and quickly access important information. Colleagues
and partners can add notes on a customer page so that the information is
instantly shared among everyone involved. Moyobase keeps track of
things to do and manages your tasks with due dates, priorities, and
notes. You can also assign tasks to others. Moyobase can plot charts
with any piece of information stored in your database.

Golden Rules Organizer is a well-structured personal organizer and goal system. It supports three planning levels: mission and values, projects, recurring and one-time activities. It includes a planner facility, and provides diary, time tracking, contact management, and hierarchical notes on any subject. Data can be extracted to spreadsheets, printed, reported, exported, and imported. It provides backup and recovery facilities. It is designed for professionals, and is suitable to novices.

XML-QOFQSF is a Perl module to convert personal data to and from QSF XML files. pilot-qof objects (pilot_address, pilot_expenses, pilot_datebook and pilot_todo) are supported. gpe-expenses is also supported.

Basqet is a tool for organizing notes, ideas, and information using a baskets concept. It supports text, pictures, and HTML links. and allows arrows to be used to connect notes. It was inspired by KDE Basket and Microsoft OneNote.